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#1
A64 / Re: eth0 disappears
Last post by LubOlimex - November 28, 2025, 11:45:03 AMI now tested with MOD-WIFI-RTL8188EUS-ANT plugged and nothing changes. The Ethernet doesn't get disconnected between reboots. Also connected via nmtui to the local WIFI network and kept rebooting but the Ethernet works just as fine after each reboot, just like it did before attaching or configuring the WIFI module.
One thing I noticed is that the power consumption is considerably higher when the WIFI module is plugged. Can this be related to the power supply unable to provide adequate powering for all parts of the board during boot?
Edit: Maybe also test in another network, since it is easy-to-replicate issue for you, you can quickly test in another network and see if it is something related to the network or network settings.
One thing I noticed is that the power consumption is considerably higher when the WIFI module is plugged. Can this be related to the power supply unable to provide adequate powering for all parts of the board during boot?
Edit: Maybe also test in another network, since it is easy-to-replicate issue for you, you can quickly test in another network and see if it is something related to the network or network settings.
#2
iMX233 / Re: Suspend Mode current - IMX...
Last post by LubOlimex - November 28, 2025, 08:20:12 AMYou don't need img or ISO, there is a raw file in the GitHub OP linked and there are instructions on how to download it to SD card:
QuoteTo install bootstream onto SD/MMC card, type: sudo dd if=sd_mmc_bootstream.raw of=/dev/sdXY
where X is the correct letter for your sd or mmc device (to check, do a ls /dev/sd*) and Y is the partition number for the bootstream
In my system sd device is /dev/sdb1, so writing bootstream file in card is done by:
$: sudo dd if=sd_mmc_bootstream.raw of=/dev/sdb1
Card is ready.
#3
A64 / Re: eth0 disappears
Last post by LubOlimex - November 28, 2025, 08:16:16 AMYou didn't mention MOD-WIFI-RTL8188EUS-ANT previously so I tested without it. This means my tests and your tests are different. How it goes with the WIFI adapter?
It might be a problem with the configuration between the networks then, like when you have more than one internet connection you probably need to use metering.
Well, these are completly different images. Everything is different. We no longer release Armbian images, but they still release community supported images (not everything is guaranteed to work tho, but we need it for testing only):
https://www.armbian.com/olimex-lime-a64/
Meanwhile, I'd test again with the MOD-WIFI-RTL8188EUS-ANT.
It might be a problem with the configuration between the networks then, like when you have more than one internet connection you probably need to use metering.
Well, these are completly different images. Everything is different. We no longer release Armbian images, but they still release community supported images (not everything is guaranteed to work tho, but we need it for testing only):
https://www.armbian.com/olimex-lime-a64/
Meanwhile, I'd test again with the MOD-WIFI-RTL8188EUS-ANT.
#4
iMX233 / Re: Suspend Mode current - IMX...
Last post by unlikeboxer - November 28, 2025, 05:11:59 AMI've never done this before, and I have no idea where to go for a.ISO or.IMG file. Who can provide an answer?
#5
A64 / Re: Use USB OTG in host mode
Last post by frm - November 28, 2025, 12:04:38 AMQuote from: LubOlimex on November 26, 2025, 09:18:28 AMSoftware-wise I don't think the Olimage image supports it, so some changes to the image are required.
This is really a pity. Right now I don't want to go through the lengthy process of rebuilding the kernel and the image myself, so I'll just use a basic USB hub to expand the single USB host port. It makes the whole setup much less compact thought :-(
Thanks
#6
A64 / Re: eth0 disappears
Last post by frm - November 28, 2025, 12:02:54 AMHi,
thanks for the reply.
Honestly if the problem was the cable I would still expect the Ethernet controller to show up in Linux, but I would expect "eth0" to be DOWN.
Something I started to notice as pattern is that this problem happens more often when the Olimex A64 board boots with the MOD-WIFI-RTL8188EUS-ANT wifi adapter on the USB plug. Does this ring any bell for you?
In my case both eth0 (wired Rj45 network itf) and the wireless itf are connected to the same L3 network.
Just to be sure to avoid the so-called ARP flux for such case, I turned on the Linux ARP filter:
I need to run a few more test and check if eth0 disappears again anyway. And I'm still puzzled whether this is an HW issue or a SW issue.
I'm downloading this one and will try.
What's the difference compared to the Olimage using Debian bullseye as base?
Thanks
thanks for the reply.
Quote from: LubOlimex on November 26, 2025, 04:28:22 PMThat line is indeed different. Can you try a different LAN cable? Also try re-writing the card and check if it works again before rebooting.
Honestly if the problem was the cable I would still expect the Ethernet controller to show up in Linux, but I would expect "eth0" to be DOWN.
Something I started to notice as pattern is that this problem happens more often when the Olimex A64 board boots with the MOD-WIFI-RTL8188EUS-ANT wifi adapter on the USB plug. Does this ring any bell for you?
In my case both eth0 (wired Rj45 network itf) and the wireless itf are connected to the same L3 network.
Just to be sure to avoid the so-called ARP flux for such case, I turned on the Linux ARP filter:
Code Select
sysctl -w net.ipv4.conf.all.arp_filter=1
sysctl -w net.ipv4.conf.default.arp_filter=1
I need to run a few more test and check if eth0 disappears again anyway. And I'm still puzzled whether this is an HW issue or a SW issue.
Quote from: LubOlimex on November 26, 2025, 04:28:22 PMMaybe also test with the Armbian image (root/1234) from our FTP: https://ftp.olimex.com/Allwinner_Images/a64-olinuxino/linux/1.latest_images/bionic/images/Armbian_5.92.1_Olinuxino-a64_Ubuntu_bionic_next_5.2.5_desktop_emmc_fix.img.7z
I'm downloading this one and will try.
What's the difference compared to the Olimage using Debian bullseye as base?
Thanks
#7
New Products release / More soldering kits
Last post by olimex - November 27, 2025, 02:04:22 PMMore kits for soldering during the Holidays: Disco glasses, Green alien bug and piano! https://olimex.wordpress.com/2025/11/27/three-new-soldering-kits-available-on-the-web/ #soldering #electronics #kits #fun #teach #kids
#8
A64 / Re: eth0 disappears
Last post by LubOlimex - November 26, 2025, 04:28:22 PMIt behaves the similarly up to a point here. On first boot Ethernet works just fine, after a reboot settings for LCD output get loaded and Ethernet stops. However, here when I run "olinuxino-display" and select the bottom option - "DISABLE" and perform a reboot, the Ethernet starts working.
This is my bootlog after running "DISABLE" and rebooting:
That line is indeed different. Can you try a different LAN cable? Also try re-writing the card and check if it works again before rebooting.
Maybe also test with the Armbian image (root/1234) from our FTP: https://ftp.olimex.com/Allwinner_Images/a64-olinuxino/linux/1.latest_images/bionic/images/Armbian_5.92.1_Olinuxino-a64_Ubuntu_bionic_next_5.2.5_desktop_emmc_fix.img.7z
This is my bootlog after running "DISABLE" and rebooting:
Code Select
U-Boot 2021.04+olimex-1-20231103.141125 (Nov 03 2023 - 14:12:49 +0000) Allwinner Technology
CPU: Allwinner A64 (SUN50I)
Model: Olimex A64-Olinuxino-eMMC
DRAM: 1 GiB
MMC: mmc@1c0f000: 0, mmc@1c11000: 1
Loading Environment from EXT4... *** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Allwinner mUSB OTG (Peripheral)
Net: phy interface7
eth0: ethernet@1c30000, eth1: usb_ether
starting USB...
Bus usb@1c1a000: USB EHCI 1.00
Bus usb@1c1a400: USB OHCI 1.0
Bus usb@1c1b000: USB EHCI 1.00
Bus usb@1c1b400: USB OHCI 1.0
scanning bus usb@1c1a000 for devices... 1 USB Device(s) found
scanning bus usb@1c1a400 for devices... 1 USB Device(s) found
scanning bus usb@1c1b000 for devices... 1 USB Device(s) found
scanning bus usb@1c1b400 for devices... 1 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
Found U-Boot script /boot/boot.scr
2274 bytes read in 3 ms (740.2 KiB/s)
## Executing script at 4fc00000
U-boot loaded from SD
Boot script loaded from mmc
Checking for /uEnv.txt...
Checking for /boot/uEnv.txt...
460 bytes read in 2 ms (224.6 KiB/s)
Loaded environment from /boot/uEnv.txt
Loading FIT image...
30553463 bytes read in 1308 ms (22.3 MiB/s)
## Loading kernel from FIT Image at 58000000 ...
Using 'config-8367' configuration
Trying 'kernel-1' kernel subimage
Description: Linux kernel 5.10.180-olimex
Type: Kernel Image
Compression: uncompressed
Data Start: 0x580000d4
Data Size: 20115464 Bytes = 19.2 MiB
Architecture: AArch64
OS: Linux
Load Address: 0x40080000
Entry Point: 0x40080000
Hash algo: crc32
Hash value: b03bc58f
Hash algo: sha1
Hash value: 5e019dd581acd68089a70153bfd56c3f01bd1b47
Verifying Hash Integrity ... crc32+ sha1+ OK
## Loading ramdisk from FIT Image at 58000000 ...
Using 'config-8367' configuration
Trying 'ramdisk-1' ramdisk subimage
Description: Ramdisk for kernel 5.10.180-olimex
Type: RAMDisk Image
Compression: Unknown Compression
Data Start: 0x5932f214
Data Size: 10231694 Bytes = 9.8 MiB
Architecture: AArch64
OS: Linux
Load Address: 0x4fe00000
Entry Point: 0x4fe00000
Hash algo: crc32
Hash value: d85ae050
Hash algo: sha1
Hash value: 142ccf6425ab1d88cd83d10c57f2d22fcc57789a
Verifying Hash Integrity ... crc32+ sha1+ OK
Loading ramdisk from 0x5932f214 to 0x4fe00000
WARNING: 'compression' nodes for ramdisks are deprecated, please fix your .its file!
## Loading fdt from FIT Image at 58000000 ...
Using 'config-8367' configuration
Trying 'fdt-1' fdt subimage
Description: unavailable
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x59cf1294
Data Size: 40945 Bytes = 40 KiB
Architecture: AArch64
Load Address: 0x4fa00000
Hash algo: crc32
Hash value: e61e59cb
Hash algo: sha1
Hash value: f309d34a7a9cdd4dc961ae36695404c71954f48b
Verifying Hash Integrity ... crc32+ sha1+ OK
Loading fdt from 0x59cf1294 to 0x4fa00000
## Loading fdt from FIT Image at 58000000 ...
Trying 'overlay-1' fdt subimage
Description: unavailable
Type: Flat Device Tree
Compression: uncompressed
Data Start: 0x59d2279c
Data Size: 330 Bytes = 330 Bytes
Architecture: AArch64
Load Address: 0x4fa10000
Hash algo: crc32
Hash value: 4feb8819
Hash algo: sha1
Hash value: 5a2294834f1bb2916cdbcde98423a535ef16022f
Verifying Hash Integrity ... crc32+ sha1+ OK
Loading fdt from 0x59d2279c to 0x4fa10000
Booting using the fdt blob at 0x4fa00000
Loading Kernel Image
Loading Ramdisk to 4963e000, end 49ffff8e ... OK
Loading Device Tree to 0000000049631000, end 000000004963dfec ... OK
Applying overlay: '/usr/lib/olinuxino-overlays/sun50i-a64/sun50i-a64-i2c0.dtbo'...
330 bytes read in 5 ms (64.5 KiB/s)
Starting kernel ...
[ 0.859198] sun50i-de2-bus 1000000.bus: Error couldn't map SRAM to device
[ 0.859775] sun4i-usb-phy 1c19400.phy: Couldn't request ID GPIO
[ 1.186127] sun8i-dw-hdmi 1ee0000.hdmi: Couldn't get regulator
[ 1.186569] sun4i-drm display-engine: Couldn't bind all pipelines components
[ 1.204207] sun4i-usb-phy 1c19400.phy: Couldn't request ID GPIO
Loading, please wait...
Starting version 247.3-7+deb11u4
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... done.
Begin: Will now check root file system ... fsck from util-linux 2.36.1
[/sbin/fsck.ext4 (1) -- /dev/mmcblk2p1] fsck.ext4 -a -C0 /dev/mmcblk2p1
/dev/mmcblk2p1: clean, 136815/955808 files, 849621/3886976 blocks
done.
done.
Begin: Running /scripts/local-bottom ... done.
Begin: Running /scripts/init-bottom ... done.
Welcome to Debian GNU/Linux 11 (bullseye)!
[ OK ] Created slice system-getty.slice.
[ OK ] Created slice system-modprobe.slice.
[ OK ] Created slice system-serial\x2dgetty.slice.
[ OK ] Created slice User and Session Slice.
[ OK ] Started Forward Password R...uests to Wall Directory Watch.
[ OK ] Set up automount Arbitrary...s File System Automount Point.
[ OK ] Reached target Remote File Systems.
[ OK ] Reached target Slices.
[ OK ] Reached target Swap.
[ OK ] Listening on Syslog Socket.
[ OK ] Listening on fsck to fsckd communication Socket.
[ OK ] Listening on initctl Compatibility Named Pipe.
[ OK ] Listening on Journal Audit Socket.
[ OK ] Listening on Journal Socket (/dev/log).
[ OK ] Listening on Journal Socket.
[ OK ] Listening on udev Control Socket.
[ OK ] Listening on udev Kernel Socket.
Mounting Huge Pages File System...
Mounting POSIX Message Queue File System...
Mounting Kernel Debug File System...
Mounting Kernel Trace File System...
Starting Restore / save the current clock...
Starting Set the console keyboard layout...
Starting Create list of st...odes for the current kernel...
Starting Load Kernel Module configfs...
Starting Load Kernel Module drm...
Starting Load Kernel Module fuse...
[ OK ] Started Nameserver information manager.
[ OK ] Reached target Network (Pre).
Starting Journal Service...
Starting Load Kernel Modules...
Starting Remount Root and Kernel File Systems...
Starting Coldplug All udev Devices...
[ OK ] Mounted Huge Pages File System.
[ OK ] Mounted POSIX Message Queue File System.
[ OK ] Mounted Kernel Debug File System.
[ OK ] Mounted Kernel Trace File System.
[ OK ] Finished Restore / save the current clock.
[ OK ] Finished Create list of st... nodes for the current kernel.
[ OK ] Finished Load Kernel Module configfs.
[ OK ] Finished Load Kernel Module drm.
[ OK ] Finished Load Kernel Module fuse.
[ OK ] Finished Load Kernel Modules.
[ OK ] Finished Remount Root and Kernel File Systems.
[ OK ] Finished Set the console keyboard layout.
Mounting FUSE Control File System...
Mounting Kernel Configuration File System...
Starting Load/Save Random Seed...
Starting Apply Kernel Variables...
Starting Create System Users...
[ OK ] Started Journal Service.
[ OK ] Mounted FUSE Control File System.
[ OK ] Mounted Kernel Configuration File System.
[ OK ] Finished Apply Kernel Variables.
[ OK ] Finished Create System Users.
Starting Flush Journal to Persistent Storage...
Starting Create Static Device Nodes in /dev...
[ OK ] Finished Flush Journal to Persistent Storage.
[ OK ] Finished Create Static Device Nodes in /dev.
[ OK ] Reached target Local File Systems (Pre).
[ OK ] Reached target Local File Systems.
Starting Set console font and keymap...
Starting Tell Plymouth To Write Out Runtime Data...
Starting Create Volatile Files and Directories...
Starting Rule-based Manage...for Device Events and Files...
[ OK ] Finished Set console font and keymap.
[ OK ] Finished Tell Plymouth To Write Out Runtime Data.
[ OK ] Finished Create Volatile Files and Directories.
[ OK ] Finished Coldplug All udev Devices.
Starting Helper to synchronize boot up for ifupdown...
Starting Update UTMP about System Boot/Shutdown...
[ OK ] Finished Helper to synchronize boot up for ifupdown.
Starting Raise network interfaces...
[ OK ] Finished Update UTMP about System Boot/Shutdown.
[ OK ] Started Rule-based Manager for Device Events and Files.
Starting Show Plymouth Boot Screen...
[ OK ] Found device /dev/ttyGS0.
[ OK ] Started Show Plymouth Boot Screen.
[ OK ] Started Forward Password R...s to Plymouth Directory Watch.
[ OK ] Reached target Local Encrypted Volumes.
[ OK ] Reached target System Initialization.
[ OK ] Started CUPS Scheduler.
[ OK ] Started Daily apt download activities.
[ OK ] Started Daily apt upgrade and clean activities.
[ OK ] Started Periodic ext4 Onli...ata Check for All Filesystems.
[ OK ] Started Discard unused blocks once a week.
[ OK ] Started Daily rotation of log files.
[ OK ] Started Daily man-db regeneration.
[ OK ] Started Run system activit...ounting tool every 10 minutes.
[ OK ] Started Generate summary o...esterday's process accounting.
[ OK ] Started Daily Cleanup of Temporary Directories.
[ OK ] Reached target Paths.
[ OK ] Reached target Timers.
[ OK ] Listening on Avahi mDNS/DNS-SD Stack Activation Socket.
[ OK ] Listening on CUPS Scheduler.
[ OK ] Listening on D-Bus System Message Bus Socket.
[ OK ] Listening on PC/SC Smart Card Daemon Activation Socket.
[ OK ] Reached target Sockets.
[ OK ] Reached target Basic System.
Starting Avahi mDNS/DNS-SD Stack...
Starting Bluetooth management mechanism...
[ OK ] Started Regular background program processing daemon.
[ OK ] Started D-Bus System Message Bus.
Starting Network Manager...
Starting Remove Stale Onli...t4 Metadata Check Snapshots...
Starting Initialize hardware monitoring sensors...
Starting LSB: Load kernel ...d to enable cpufreq scaling...
[ OK ] Started Realtek H5 bluetooth support.
Starting LCD-OLinuXino RTP calibrabion...
Starting Authorization Manager...
Starting System Logging Service...
Starting Resets System Activity Logs...
Starting User Login Management...
Starting Disk Manager...
Starting WPA supplicant...
[ OK ] Finished Initialize hardware monitoring sensors.
[ OK ] Finished Resets System Activity Logs.
[ OK ] Finished Raise network interfaces.
[ OK ] Reached target Hardware activated USB gadget.
[ OK ] Finished LCD-OLinuXino RTP calibrabion.
[ OK ] Finished Remove Stale Onli...ext4 Metadata Check Snapshots.
[ OK ] Started System Logging Service.
[ OK ] Found device /dev/ttyS0.
[ OK ] Started LSB: Load kernel m...ded to enable cpufreq scaling.
Starting LSB: set CPUFreq kernel parameters...
[ OK ] Finished Load/Save Random Seed.
[ OK ] Started User Login Management.
[ OK ] Started Avahi mDNS/DNS-SD Stack.
[ OK ] Started WPA supplicant.
[ OK ] Started LSB: set CPUFreq kernel parameters.
Starting LSB: Set sysfs variables from /etc/sysfs.conf...
[ OK ] Found device /sys/subsystem/net/devices/eth0.
[ OK ] Started ifup for eth0.
[ OK ] Started Authorization Manager.
Starting Modem Manager...
[ OK ] Started LSB: Set sysfs variables from /etc/sysfs.conf.
[ OK ] Started Network Manager.
[ OK ] Reached target Network.
Starting Network Manager Wait Online...
Starting CUPS Scheduler...
Starting Network Time Service...
Starting OpenVPN service...
Starting OpenBSD Secure Shell server...
Starting Permit User Sessions...
[ OK ] Started Unattended Upgrades Shutdown.
[ OK ] Finished OpenVPN service.
Starting Hostname Service...
[ OK ] Finished Permit User Sessions.
Starting Light Display Manager...
Starting Hold until boot process finishes up...
[ OK ] Started Network Time Service.
[ OK ] Started CUPS Scheduler.
[ OK ] Finished Hold until boot process finishes up.
Debian GNU/Linux 11 a64-olinuxino ttyS0
a64-olinuxino login:
That line is indeed different. Can you try a different LAN cable? Also try re-writing the card and check if it works again before rebooting.
Maybe also test with the Armbian image (root/1234) from our FTP: https://ftp.olimex.com/Allwinner_Images/a64-olinuxino/linux/1.latest_images/bionic/images/Armbian_5.92.1_Olinuxino-a64_Ubuntu_bionic_next_5.2.5_desktop_emmc_fix.img.7z
#9
AVR / Re: AVR-ISP-MKII flashing firm...
Last post by hurrdurr - November 26, 2025, 04:27:07 PMHi, FYI I had the same issue as OP and the following is the solution:
Step 1: Perform flash erase.
From dfu-programmer user manual:
" erase [--suppress-validation]
Erases all the flash memory. This is required before the bootloader will perform other commands."
Command:
Step 2:
Write to flash.
Step 1: Perform flash erase.
From dfu-programmer user manual:
" erase [--suppress-validation]
Erases all the flash memory. This is required before the bootloader will perform other commands."
Command:
Code Select
dfu-programmer [target] eraseexample: Code Select
dfu-programmer at90usb162 eraseStep 2:
Write to flash.
Code Select
dfu-programmer [target] flash [file]example: Code Select
dfu-programmer at90usb162 flash --debug 99 ./Desktop/AVR-ISP-MK2-Firmware-WindowsDrivers/Firmware_Drivers/LATEST-FIRMWARE/OLIMEX-AVR-ISP-MK2.hex #10
New Products release / Three size breadboards, new hi...
Last post by olimex - November 26, 2025, 10:59:00 AMProduct Highlight: Three sizes Breadboards, New High current power cables, air bubble level indicator https://olimex.wordpress.com/2025/11/26/product-highlights-breadboards-power-cables-level-indicator/ #breadboard #power #cable #levelindicator